Inverter control method and system
A control method and inverter technology, which is applied in the direction of converting irreversible DC power input into AC power output, can solve the problems of inverter output power mismatch, narrow control bandwidth, and failure to take into account, so as to achieve improvement. Effects of matching phenomenon, reducing fluctuation range, and reducing amplitude
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[0035] Under the condition that the grid voltage is stable, the output power of the DC power supply and the output power of the inverter basically match, that is, the difference between the two output powers is within a preset range. However, under some weak grid conditions, the grid voltage changes frequently, especially when the bus capacitor capacity is small and the control bandwidth of the voltage outer loop is narrow, which will cause the output power of the inverter to change, which will further cause the output power of the DC power supply and The output power of the inverter does not match, which causes the DC bus voltage to rise or drop suddenly, causing the inverter output current to oscillate, and even causing the inverter to fail and go off-grid.
[0036] Among them, there are various forms of realization of the DC power supply. For example, in the field of photovoltaic power generation, DC power can be provided by photovoltaic modules, or by photovoltaic modules ...
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